Dinosaur Hall

Jane G. Pisano Dinosaur Hall

The all-new, 14,000-square-foot Jane G. Pisano Dinosaur Hall is twice the size of the Museum’s old dinosaur galleries. It will rival the world’s leading dinosaur halls for the number of individual fossils displayed, the size and spectacular character of the major mounts, including the world’s only Tyrannosaurus rex growth series, and the way that paleontology comes alive! In these spacious, light-filled galleries, visitors will encounter science not as static information but as a vibrant, ongoing investigation into mysteries — some resolved and some still being explored.

The stunning centerpiece of this gallery is the Tyrannosaurus rex growth series, featuring a baby, juvenile, and sub-adult T. rex. It's the only series of its kind in the world.

Baby: About 2 years old when it died, this 11-foot long specimen is the youngest known T. rex fossil in world.

Juvenile: At the young age of 13, this T. rex already measured more than 20 feet long and weighed about 4,000 pounds. A rare specimen, this fossil provides a crucial link in understanding the rapid growth of the T. rex.

Thomas the T. rex: This never-before-seen fossil was excavated by NHMLA paleontologists in southeastern Montana from 2003-2005. It is estimated to be a 70% complete specimen, one of ten most complete T. rex specimens on Earth. At 17 years old, 34 feet long and nearly 7,000 pounds, this giant completes a series showing dramatic changes and rapid growth of T. rex. Mid-spurt, it’s estimated that a T. rex could gain 1,500 pounds in a year.

Sponsored by Kenneth and Elaine Otter Leventhal

This imposing, never-before-displayed Triceratops greets visitors as they enter the exhibition at the start of Gallery 2.

It stands at approximately 25 feet long.

It is assembled from fossils discovered on four different Dinosaur Institute field expeditions to Montana and Wyoming from 2002-2006.

Triceratops is a late Cretaceous dinosaur, living around 66 million years ago.

Sponsored by Pradip and Rekha Choksi

Stegosaurus is an armored dinosaur with a back covered in large plates and with large spikes on its tail. This Stegosaurus is mounted fighting with the predator Allosaurus. Allosaur fossils have been found that show wounds from Stegosaurus spikes, which is why they’re posed the way they are in the Dinosaur Hall.